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net: dsa: prepare master receive hot path

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In preparation to make DSA master devices point to their corresponding
CPU port instead of the whole tree, add copies of dst and rcv in the
dsa_port structure so that we keep fast access in the receive hot path.

Also keep the copies at the beginning of the dsa_port structure in order
to ensure they are available in cacheline 1.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot
2017-09-29 17:19:19 -04:00
committed by David S. Miller
parent 152402483e
commit 3e41f93b35
3 changed files with 13 additions and 0 deletions
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5
include/net/dsa.h
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@@ -178,6 +178,11 @@ struct dsa_port {
/* CPU port tagging operations used by master or slave devices */
const struct dsa_device_ops *tag_ops;
/* Copies for faster access in master receive hot path */
struct dsa_switch_tree *dst;
struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt);
struct dsa_switch *ds;
unsigned int index;
const char *name;